Headphone stand



FIG. 1 is a bottom plan view of a headphone stand, showing my new design; and,

FIG. 2 is a bottom, perspective view thereof.

The broken lines depict portions of the headphone stand which form no part of the claimed design.

The cross-hatched areas shown represent areas of color. 

CLAIM I claim the ornamental design for a headphone stand, as shown and described. 